Collecting Water Samples

The Conductivity, Temperature and Depth (CTD) probe lies within a large carousel of Niskin water bottles. The carousel is lowered to the seafloor while the CTD makes measurements. On the 'ride' up, a person on deck triggers the water bottles to close (one at a time) to collect a water sample at different depths. Photo credit: Mitch Elend, University of Washinton, V14.